The book Amusing Ourselves to Death by Neil Postman seems really relevant here. The thesis is that different modes of information are best suited to different tasks. Postman argues that television is best suited for entertainment. So the programs that do well on TV will naturally tend to be entertainment.

That book was written in 1985, but the core observations are also applicable to modern cellphones (which have become, for the majority of users, entertainment devices).

Postman then talks about how our communication systems have degraded as a result of entertainment being the strength of our current modes.

Fantastic read.